diff --git a/src/osx/window_osx.cpp b/src/osx/window_osx.cpp
index 5520e1ba5f..61bf54cbea 100644
--- a/src/osx/window_osx.cpp
+++ b/src/osx/window_osx.cpp
@@ -14,6 +14,7 @@
 
 #ifndef WX_PRECOMP
     #include "wx/log.h"
+    #include "wx/math.h"
     #include "wx/app.h"
     #include "wx/utils.h"
     #include "wx/panel.h"